Chap. 29 physics
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What are two examples of materials that are less rigid to light? | glass and water
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| A mirror that curves outward is called a...mirror? | convex
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| What type of mirror makes light rays converge when they reflect? | concave
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| What does a concave mirror do to the image, when the object is far away? | makes it small and inverted
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| Where do you see convex mirrors? | in gas stations and busses
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| What is a real image? | image formed by converging light rays; can be displayed on a screen
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| Is a virtual image inverted or up right? | up right
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| What determines whether an object is a diffuse or polished reflector? | wavelengths of the waves it reflects
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| What is one example of a diffuse reflector and one example of a polished reflector? | diffuse: paper, polished: mirror
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| Why is paper a diffuse reflector? | very rough surface for light rays so they reflect in many directions
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| Is a polished surface considered polished for all wavelengths? | no, may be polished for long but not for short wavelengths
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| What reflects more sound, rigid and smooth or soft and irregulare surfaces? | rigid and smooth
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| What happens to sound that is not reflected? | it's absorbed or transmitted
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| What is acoustics? | study of reflective properties of surfaces
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| Reverberations, caused by very reflective walls, can do what to sound? | garble it
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
odurbin
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